Forum Discussion

rwhitt's avatar
rwhitt
Explorer
Jun 18, 2015

Looking to install new tires.

Looking hard at going with a 295-75-22.5 vs 295-80-22.5. Much cheaper and also easier to find in a pinch. Thoughts or experience? Thanks
  • Ivylog's avatar
    Ivylog
    Explorer III
    rwhitt wrote:
    Thanks Ivylog, just curious why u went with the 315 instead of 295? I assume the 11R's are a little less expensive than the 80's?


    My front axle is just under 14K lbs and I go 5 psi over what's needed so a 295/80 required 110+5=115 psi while a 315/80 requires 95+5=100. The 295's on the rear only required 75+5=80 and the 11R requires 85+5=90. Yes the 11R is much less expensive and it's a very common truck tire. I'm using Firestone on the front and Hankook on the rear.

    OP, if your front axle is 12K then I would run 90+5=95 but a 295/75 would require 105+5=110... a harsher ride and maybe a G rated tire.
  • Since tires are the cheapest insurance you can buy I'd opt for the ones that have the highest carrying load (that fit the available space, of course).
    Is the difference in cost between the sets more than the cost of one tire? If the higher load range tires save one tire problem (flat or blowout)they would seem to be the better value.
    But that's just my $.03.
  • Thanks Ivylog, the salesman did not mention the weight difference. Just curious why u went with the 315 instead of 295? Not sure what my front end weight is but it is heavy best I remember around 12K plus when I had it weighed. I'll go back and look. I assume the 11R's are a little less expensive than the 80's?
  • Ivylog's avatar
    Ivylog
    Explorer III
    How much weight is on the front axle of your 02 American Eagle? A 295/80 is good for 6550 lbs at 100 psi BUT the 295/75 is only 5780. At 115 psi there is a 1000 lb difference in what they can carry. The 75 is 511 revs/mile while the 80 is 497... a 3% difference in your speedometer.

    On my rig instead of replacing my 295/80 I went with 315/80 on the front and 11R22.5 on the rear. Had to increase my rear pressures from 80 to 90 because of the lower load rating of the 11Rs but they are almost the same revs/mile.
  • Our rig had 19.5 tires, so I can't comment on the size difference. If you're out west, where Les Schwab has stores, that would be a good place to start.

    When we bought our 8-year-old rig, it still had the OEM chassis build date tires (almmost 10 years old). We went to the Schwab store in town and got 6-weeks from mold date Toyos. Knowing they were for an RV, the store manager deliberately went looking for the most recent date in the warehouse. They were a lot cheaper (maybe 20%) than anywhere else in the area for other brands.

    We've had Toyos on our family vehicles for many years - never a problem.

    Note - we have no connection with Schwab or Toyo, other than being satisfied customers for over 30 years.
  • Have the shop check the sidewall to sidewall clearance on the duals.
    The "75" will be slightly wider than the "80" so you want proper
    spacing. The "75" will also be slightly shorter and the speed-o will be
    slightly off.